Spark-arrester for locomotives.



T. H. DENSMORE'. SPARK ARRESTER FOR LOCOMOTIVES.

. I APPLICATION FILED MAY21, 1909.

Patented M21118, 1910.

WITNESSES ANDREW a GRAHAM co, FHOTO-LIYHOGVIAPNERS,WASNINGIONVDC.

lot; the-cab supported upon the fire box.

rrioivms H. nnlvsiuortn, on creative meter, o vranro, cannon, Assienonor one.

HALr'rorvoBEnr nynarurtroiwor GRAND VALLEY, crlnana.

srAaK-annns'rnrt Application filed May 21,

may be conveniently operated from the engine cab and in which theextinguishing of the arrested sparks is assured, in which there is noliability of the en ine becoming choked by soot, which may be thoroughlycleaned with a minimum amount of labor and by which the free draft ofthe engine is not interfered with and itconsists essentially of atubular casing extendingaround the engine stack and to a distance abovethe same having openings therein located above the stack, a tubulargauzescreen extending overthe openings and secured to the casing, a lidfor the casing, a conical concave deflector extending therefromintoproximity to the stack, a burred brush held against the screen in such.a way asto force the bristles of the brush through the interstices ofthe screen, means for ,revolving'. the brush around the screen operatedfromthe cab, means for raising and means for locking thecasing lid alsooperated from the cab and means for. cleaning the deposit formed in thecasing operated from the cab as hereinafter more particularly describedby the following specification; i it Figure 1,is a general perspectiveview of the major portion of a locomotive engine showing tially' brokenaway and in sectionshowing the engine stack and that portion of my apgparatus which is connected thereto. Fig. 3,1 is an enlarged crosssectional view through thatportion of the apparatus shown in Fig. 2.Fig. 4, is a sectional plan view taken on,

line w--y Fig. 3. Fig. 5is an enlargedj view of part of Fig. 3. 1

In the drawings like letters of reference indicate corresponding partsin each figure.

A" is the engine boiler, A the front portion of the fire box and A?the-front portion Specification of Letters Patent.

my apparatus applied thereto; Fig. 2,1s an enlarged perspectivedetailpar FOB LOCOMOTIVES.

Patented Mar. d, 191. 1909. Serial No. 497,492.

A is the stack of the locomotive con- W nected at its lower end to theusual casting At B isia tubular casing tapered preferably toward itslowerend at B and provided at the lower end of such tapered portion withan annular flange B provided with holes B through which the usual bolts15 are de signed to extend to secure the casing around the stack A Thetubular casing B extends upwardly above the stack and 1s provided atsuch upper end with openings 13*. V

B is a tubular screen of wire gauze surrounding the tubular casing Babove the stack andextending over the openings 13* of gap the casing.

O is a lid for the casing hinged at C" and provided with an annularoutwardly flared flange C.

O is a conical projection extending downu wardlyfrom the lid and securedthereto and extending into proximity with the top of the stack. Thesides of the cone are formed concave and at the base of the cone theends are turned downwardly so as to form the flange C By this means thesparks and smoke pass upwardly the conical projection forms a deflectorto direct the smoke and sparks outwardly and downwardly against thescreen. The sparks thereby are caught in the meshes of the screens asthey are driven outwardly away from the stack. i y l C is a tail piecesecured to the rear of the lid 0. y i i i i i 90 C is a bell crankpivotally supported upon a stud G located in proximity to the base ofthe stack. i

O is a link connecting one arm of the bell crank C with the tail piece O1 C is a suitable co-acting lever and quad rant pivotally supported on afulcrum bar C located in the cab of the engine. The upper end of thelever O is connected by a link C to the lower arm of the bell crank 1lever C. l y i a To lock the lid G in place I provide the followingmechanism: 0 is a loop depending from the lid and to the opposite sideof the lid to that on which the hinge is se- 1 cured. C is a loopsecured to the casingB and being near to the end of the loop 0*.

G is a loop also secured tothe casing B. C is a segmental bar extendingthrough the loops 0 G 30. C is a stud extending 1 outwardly from thesegmental bar G on which is secured a vertical bearing C". C l is a bellcrank secured to the stud C secured to the casing B. O is a linkconnecting one arm of the bell crank to the vertical bearing C, suchlink being provided at one end with a vertical portion extending intothe vertical bearing C and at the other end with the horizontal hingepin connecting such end with the bell crank. C

a bell crank mounted on the stud C hereinbefore described. The upper armof the bell crank C is connected by a link rod C to the lower arm of thebell crank C The lower arm of the bell crank C is connected by a linkrod (3 to a lever C also mounted on the fulcrum bar C located in theengine cab. By operating the lever C the segmental locking bar C ismoved circumferentially so that the end extending from the loop G passestherefrom into the loop 0 thereby unlocking the lid C and allowing thesame to be raised by the operating lever C". It will therefore be seenthat when the locomotive reaches a stretch of country in which it isunnecessary to arrest the sparks the lever C may be operated to open thelid C thereby allowing of a direct upward draft of the engine.

To clean the screen to prevent its becoming choked by dead sparks Iprovide the following mechanism: D is an annular gearing secured aroundthe tubular casing B by brackets D and D located above and below thegearing D. By this construction the gearing l) is free to revolve aroundthe tubular casing} B. D is an arm extending upwardly fromi the gearring and provided with an off-setj D on which is loosely journaled abrush D i formed preferably of stiff wire bristles de-l signed to beheld in contact with the screen so as to pass through the intersticesthereof. The upper end of the arm D is suitably braced by the rods Dextending from the top of the arm D to each side thereof and connectedat their lower ends to a suitable portion of the gear ring D. E is avertical spindle journaled at its upper end in a bracket E secured tothe casing B and at its lower end in a bracket E also secured to thecasing. The upper end of the spindle is provided with a lantern pinion Eand the lower end of the spindle is provided with a bevel gear E E is aspindle journaled at one end in the portion E of the bracket Theopposite end of the spindle E is pro vided with a crank handle E F is adiaphragm located inside of the tubular casing and surrounding thestack. such diaphragm extending across between the stack and the innerwall of the casing B. F is an opening formed in the side of the casing Bin proximity to the lower end thereof. F is a duct extending'from suchopening around the side of the boiler of the engine. It will be seen 011referring to Fig. 3 that the diaphragm F is disposed in an inclinedposition so as to carry the deposit formed inside the easing into theduct F. F is a slide valve located in the duct F and designed tonormally close the same. F" is a bell crank pivo-tally supported in asuitable bracket 1 and connected at one end by the link I? to the slidevalve F F is a rod connecting the operating end of the bell crank with alever F also fulcrumed on the bar C" located in the engine cab. F" is asteam pipe leading from the boiler of the engine and extending into thepassageway l below the valve I The end of the pipe is provided with anozzle F directed dowinvardly in a direction parallel with the passage FF is a globe valve provided with a suitable spindle F on which issecured a worm gearing F. F is a worm located on the spindle F whichextends back 'ardly through the stack into the engine cab at which endthe top is provided with a crank handle F hen it is desired to clean thestack I rotate the crank handle E thereby through the spindle E gears Eand E spindle E and lantern gear E the ring gear D is rotated carryingthe brush D with it around the screen B*. As the brush D is carriedaround the screen the stiff bristles of the brush are forced through thechoked interstices of the screen so as to force the dirt therefrom. Thedirt cleaned from the screen falls down inside the tubular casing Bbetween the stack and the inner wall of the tubular casing and onto theinclined diaphragm F which directs the deposit downwardly into aposition over the valve F. lVhen a suitable place has been reached todeposit the dirt collected in the tubular casing B I operate the lever Fso as to tilt the bell crank F on its pivot to thereby withdraw the'alve F so as to open the passage way F to allow the dirt contained inthe tubular casing B to pass therethrough. To aid in carrying the dirtthrough the passage way F and also to insure of all the sparks beingextinguished in such dirt, I operate the crank handle F so as to rotatethe rod F by means of the worm F and worm gear F thereby opening thevalve F so as to allow of a jet. of. steam passing from the nozzle Fthrough the passage way 1 toward the exit opening thereby carrying thedirt with it.

From this description it will be seen that I have devised a very simpleform of spark arrester which will be always under the control of theengineer stationed in the engine cab and which may be readily cleaned atany time during the run and from which there is no danger of anyunextinguished sparks passing therefrom.

lVhat I claim as my invention is:

1. In a device of the class described, the

names combination with a tubular casing and a stack inclosed by saidcasing, of a hinged lid for the upper end of the casing and a Wire gauzescreen located in the casing, loops secured to the casing and lid andbeing in proximity to each other, a segmental bar slidably held Withinthe loops and means for slidably operating such bar from the engine cabas and for the purpose specified.

2. In a device of the class described, the combination With the enginecasing and hinged lid therefor and a stack inclosed by said casing, of ascreen located in the casing, loops extending from the Walls of thecasing in proximity to the lid and a loop extending from the lid inproximity to the loops extending from the casing, a segmental barslidably held Within the loops, a bell crank suitably pivoted on asuitable portion of the casing, and connected With the segmental bar anda link and lever mechanism for operating such bell crank as and for thepurpose specified.

3. In a device of the class described, the combination with the tubularcasing provided With peripheral openings, and a tubular screen extendingover such openings, of a vertically disposed roller brush rotatable on avertical axle and having bristles extending into the interstices of thescreen and means for carrying the axle of the brush around the outsideof the screen operated from the engine cab as and for the purposespecified.

4. In a device of the class described, the combination With the tubularcasing provided With peripheral openings, and a tubu' lar screenextending over such openings, of an annular gear ring revolublysupported and surrounding the casing, a vertically disposed roller brushsupported by the gear ring and held in contact With the screen andsuitable operating gears for rotating such gear ring operated from theengine cab as and for the purpose specified.

THOMAS H. DENSMORE.

Witnesses:

MARTHA J. DUFFY, M. G. VARCOE.

